My guess is that ClockView contains an enumeration specifying different values for civilian and military.

Example:

Code:

class ClockView
{
...
public:
enum
{
civilian = 0,
military
};
...
};

Then, in your display function, you can test the parameter to see if it == civilian (0) or military (1) by accessing the enumeration using the scope resolution operator as follows: ClockView::civilian or ClockView::military.